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Quadraphonic
Quadraphonic (or quadrophonic, also called quadrasonic or by the neologism quadio [portmanteau, formed by analogy with "stereo"]) sound – equivalent to what is now called 4.0 surround sound – uses four audio channels in which speakers are positioned at the four corners of a listening space. The system allows for the reproduction of sound signals that are (wholly or in part) independent of one another. Four channel quadraphonic surround sound can be used to recreate the highly realistic effect of a three-dimensional live concert hall experience in the home. It can also be used to enhance the listener experience beyond the directional limitations of ordinary two channel stereo sound. Quadraphonic audio was the earliest consumer product in surround sound. Since it was introduced to the public in the early 1970s many thousands of quadraphonic recordings have been made. Quadraphonic sound was a commercial failure when first introduced due to a variety of technical issues and form ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stereo Quadraphonic
SQ Quadraphonic ("Stereo Quadraphonic") was a Matrix decoder, matrix 4-channel quadraphonic sound system for Vinyl record, vinyl LP records. It was introduced by Columbia Records, CBS Records (known in the United States and Canada as Columbia Records) in 1971. Many recordings using this technology were released on LP during the 1970s. Record companies who adopted this format include: Angel Records, Angel, CTI Records, CTI, Columbia Records, Columbia (internationally called Columbia Records, CBS Records), EMI, Epic Records, Epic, Eurodisc, Harvest Records, Harvest, His Master's Voice (British record label), His Master's Voice, Seraphim Records, Seraphim, Supraphon and Vanguard Records, Vanguard. With matrix formats, the four sound channels (forward left, forward right, back left, back right) are converted (encoded) down to two channels (left, right). These are then passed through a two-channel transmission medium (usually an LP record) before being decoded back to four channels an ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
QS Regular Matrix
Quadraphonic Sound (originally called Quadphonic Synthesizer, and later incorrectly referred to as RM or Regular Matrix) was a phase amplitude Matrix decoder, matrix 4-channel quadraphonic sound system for phonograph records. The system was based on technology created by Peter Scheiber, but further developed by engineer Ryosuke Ito of Sansui Electric, Sansui in the early 1970s. The technology was freely licensed and was adopted by many record labels including ABC Records, ABC, Advent, BluesWay Records, BluesWay, Candide, Command Records, Command, Decca Records, Decca, Impulse! Records, Impulse, Longines Symphonette Society, Longines, MCA Records, MCA, Passport Records, Passport, Pye Records, Pye, Turnabout and Vox Records, Vox. More than 600 LP record titles using this technology were released on vinyl during the 1970s. RM (''Regular Matrix'') was often used a synonym for the 'Sansui QS', 'Toshiba QM' and 'Nippon Columbia QX' matrix systems that were previously launched before the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stereo-4
Stereo-4, also known as EV (from Electro-Voice) or EV-4, was a matrix 4-channel quadraphonic sound system developed in 1970 by Leonard Feldman and Jon Fixler. The system was heavily promoted by RadioShack stores in the United States, and some record companies released LP albums encoded in this format. It was the first commercial quadraphonic sound system for LP records. Development The original EV system was compatible with the Dynaquad DY system, and is related to Sansui's QS Regular Matrix system. The EV and QS records are very close to each other—it would take an expert to tell them apart by ear. EV decoders were sometimes used to produce pseudo 4-channel effects from 2-channel stereo recordings. In 1973 Electro-Voice signed an agreement with Columbia/ CBS Records to build a new ''universal'' decoder that could decode both SQ and EV records with good results. It could even decode QS records—again, with good results. EV later suggested the same coefficients for an en ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Compatible Discrete 4
Compatible Discrete 4, also known as Quadradisc or CD-4 (not to be confused with compact disc) was a discrete four-channel quadraphonic system for phonograph records. The system was created by JVC and RCA in 1971 and introduced in May 1972. Hundreds of recordings using this technology were released on LP during the 1970s. Other major record companies who adopted this format include A&M, Arista, Atlantic, Capricorn, Elektra, Fantasy, Nonesuch, Reprise and Warner Bros. This was the only discrete quadraphonic phonograph record system to gain major industry acceptance. A competing system, UD-4, was later introduced by Denon ( Nippon Columbia). In discrete quadraphonic systems, all four channels remain fully independent of each other throughout the entire recording and reproduction chain. There is no intermingling of channels as is done in matrix decoder 4-channel systems such as Stereo Quadraphonic (SQ) and QS Regular Matrix. Though CD-4 and other quadraphonic tech ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
8-track Tape
The 8-track tape (formally Stereo 8; commonly called eight-track cartridge, eight-track tape, and eight-track) is a magnetic-tape sound recording technology that was popular from the mid-1960s until the early 1980s, when the compact cassette, which pre-dated the 8-track system, surpassed it in popularity for pre-recorded music. The format was commonly used in cars and was most popular in the United States and Canada and, to a lesser extent, in the United Kingdom, Ireland and Japan. One advantage of the 8-track tape cartridge was that it could play continuously in an endless loop, and did not have to be ejected, turned around and reinserted to play the entire tape. After about 80 minutes of playing time, the tape would start again at the beginning. Because of the loop, there is no rewind. The only options the user has are play, fast forward, record, and program (track) change. [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Surround Sound
Surround sound is a technique for enriching the fidelity and depth of sound reproduction by using multiple audio channels from speakers that surround the listener ( surround channels). Its first application was in movie theaters. Prior to surround sound, theater sound systems commonly had three ''screen channels'' of sound that played from three loudspeakers (left, center, and right) located in front of the audience. Surround sound adds one or more channels from loudspeakers to the side or behind the listener that are able to create the sensation of sound coming from any horizontal direction (at ground level) around the listener. The technique enhances the perception of sound spatialization by exploiting sound localization: a listener's ability to identify the location or origin of a detected sound in direction and distance. This is achieved by using multiple discrete audio channels routed to an array of loudspeakers. Surround sound typically has a listener location ( sweet ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Columbia Records
Columbia Records is an American record label owned by Sony Music Entertainment, a subsidiary of Sony Music Group, an American division of multinational conglomerate Sony. Founded in 1889, Columbia is the oldest surviving brand name in the recorded sound business, and the second major company to produce records. It is one of Sony Music's four flagship record labels, along with Epic Records, RCA Records and Arista Records. History Beginnings (1888–1929) The Columbia Phonograph Company was founded on January 15, 1889, by stenographer, lawyer, and New Jersey native Edward D. Easton (1856–1915) and a group of investors. It derived its name from the District of Columbia, where it was headquartered. At first it had a local monopoly on sales and service of Edison ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Peter Scheiber
Peter Scheiber was a classically trained musician and audio engineer. He was considered to be the originator of multichannel ''matrix'' audio formats, a mathematical formula used to convert four audio channels into two and back again. Scheiber was also the inventor of the 360-degree spatial decoder. Like Lou Dorren, Scheiber was an early pioneer of multi-channel sound. It has been written that Scheiber pioneered the surround sound technology that is used in theaters today and referred to as Dolby Surround. In matrix quadraphonic systems four channels are converted (encoded) down to two channels. These two matrixed channels are recorded onto tape or vinyl record. Reproduction occurs via a two-channel stereo transmission medium - in most cases a vinyl record - these are decoded back to four channels and reproduced via four loudspeakers. Musician Scheiber, an Oberlin College music graduate, obtained a full scholarship to study with the first-chair players of the Boston Symphon ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
LP Record
The LP (from long playing or long play) is an Analog recording, analog sound storage medium, specifically a phonograph record format characterized by: a speed of revolutions per minute, rpm; a 12- or 10-inch (30- or 25-cm) diameter; use of the "microgroove" groove specification; and a vinyl (a copolymer of vinyl chloride acetate) composition disk. Introduced by Columbia Records in 1948, it was soon adopted as a new standard by the entire US record industry and, apart from a few relatively minor refinements and the important later addition of stereophonic sound in 1957, it remained the standard format for record albums during a period in popular music known as the album era. LP was originally a trademark of Columbia and competed against the smaller 7-inch sized Single (music), "45" or "single" format by RCA Victor, eventually ending up on top. Today in the vinyl revival era, a large majority of records are based on the LP format and hence the LP name continues to be in use ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sansui Electric
was a Japanese manufacturer of audio and video equipment. Headquartered in Tokyo, Japan, it was part of the Bermuda conglomerate (from 2011). The company was founded in Tokyo in 1947 by Kosaku Kikuchi, who had worked for a radio parts distributor in Tokyo before and during World War II. Due to the poor quality of radio parts Kikuchi had to deal with, he decided to start his private radio part manufacturer facility in December 1944 in Yoyogi, Tokyo. He chose transformers as his initial product line. Kikuchi's thought was "Even with higher prices, let's make the higher quality of products."tube-amps.net 2015-01-02, Sansui in Early Days retrieved 2020-04-23. In 1954 manufacturing pre-amp, main-amp kits, as well as finished amplifiers which used tubes, was started; in 1958 Sansui introduced ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
DVD-Audio
DVD-Audio (commonly abbreviated as DVD-A) is a digital format for delivering high-fidelity audio content on a DVD. DVD-Audio uses most of the storage on the disc for high-quality audio and is not intended to be a video delivery format. The standard was published in March 1999 and the first discs entered the marketplace in 2000. DVD-Audio was in a format war with Super Audio CD (SACD), and along with consumers' tastes tending towards downloadable music, these factors meant that neither high-quality disc achieved considerable market traction; DVD-Audio has been described as "extinct" by 2007. DVD-Audio remains a niche market but some independent online labels offer a wider choice of titles. Audio specifications DVD-Audio offers many possible configurations of audio channels, ranging from single-channel mono to 5.1-channel surround sound, at various sampling frequencies and sample rates. (The ".1" denotes a low-frequency effects channel (LFE) for bass and/or special audio e ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Phonograph Record
A phonograph record (also known as a gramophone record, especially in British English) or a vinyl record (for later varieties only) is an analog sound storage medium in the form of a flat disc with an inscribed, modulated spiral groove. The groove usually starts near the outside edge and ends near the center of the disc. The stored sound information is made audible by playing the record on a phonograph (or "gramophone", "turntable", or "record player"). Records have been produced in different formats with playing times ranging from a few minutes to around 30 minutes per side. For about half a century, the discs were commonly made from shellac and these records typically ran at a rotational speed of 78 rpm, giving it the nickname "78s" ("seventy-eights"). After the 1940s, "vinyl" records made from polyvinyl chloride (PVC) became standard replacing the old 78s and remain so to this day; they have since been produced in various sizes and speeds, most commonly 7-inch discs pla ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
